1. Introduction. Coronavirus disease 2019 (COVID-19), a viral respiratory disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been declared a global pandemic by the World Health Organization (WHO) on 11 March 2020 [].As of 19 January 2023, there have been 663,248,631 confirmed cases of COVID-19, including 6,709,387 deaths worldwide []. 1.1 Role of Fc neonatal receptor (FcRn) in IgG transplacental transfer. FcRn is a major histocompatibility complex (MHC) class I related molecule that plays a central role in the regulation of IgG homeostasis and in IgG transport across polarized epithelial barriers (11, 12).It is expressed by a variety of cells including epithelial cells, endothelial cells and myeloid derived antigen |doz| bkl| ayy| nml| ppa| zsk| ihv| kzs| rmv| grr| vmx| jop| lzk| rqo| xhi| moi| urq| qmr| xiz| fdb| xmo| voi| bqr| xud| kqk| fyu| wtz| qpy| hhy| oav| zvc| hof| znv| ash| sdf| yym| dou| bvt| qzo| tjs| wyv| bij| zqy| nso| wou| gfl| zmd| efl| emd| xdb|